Grannies go international! They're at it again! This time, the Guerrilla Grannies' mission leads them to London, England, and they're about to show one man why he shouldn't have messed with a granny's family. Their employers at the Cloak and Dagger Corporation took possession of Monty, but a group of international mafia men want him back. Funny thing is, they've had an operative hiding in plain sight for a long time. Now, the women must defend their employer even as they trip over themselves, insult one another, and don their disguises to become the grannies once more.